Ajax will be without Hakim Ziyech for the second leg of their Europa League last-32 tie with Getafe, Erik ten Hag has confirmed.
Ziyech will join Chelsea at the end of the season, with the player having agreed a five-year contract to move to Stamford Bridge.
The Morocco international was a star of Ajax's charge to the Champions League semi-finals last season and has scored nine goals across all competitions in 2019-20.
However, a calf problem ruled him out for the opening leg against Getafe, which Ajax lost 2-0 in Spain.
Ziyech missed a 1-0 defeat to Heracles on Sunday with a recurrence of the issue and Ten Hag has now revealed the 26-year-old will be absent again on Thursday.
"Still for the same reason, he hasn't recovered enough," Ten Hag said in a news conference when asked about Ziyech.
"Given the injury, we cannot take a big risk with that. We cannot risk putting everything at stake for one match."
Sunday's defeat left Ajax just three points clear of AZ at the top of the Eredivisie, though Ten Hag has been boosted by the return of Quincy Promes. Noussair Mazraoui and David Neres, however, are both still out.